From Farhad Saberi on Sun, 30 Jan 2000
Hello, my situation is this::
"provide a wiring diagram of an Ethernet (802.3) 100 Mbps network for the following application:
Company A has two offices located 1km apart. Each office has
about 40 computers. All the computers will need to be interconnected
on the same LAN. "
Apparently, I have to use full-duplex fiber optics because of the distance of 1 km.
My problem is that I don't know how many hubs I can use. Is there a restriction on the number of hubs, according to some standards ?
This sounds suspiciously like a homework assignment rather than a problem you are actually having around the house, office or campus.
Personally I think you should refer to whatever textbooks or lecture notes that you should have seen before this question was posed to you.
The standards that govern ethernet are maintained by the IEEE (Institute of Electrical and Electronics Engineers). You're interested in the 802 series of documents (Maybe you wondered what those funny numbers in that question were about). Not that I'm actually suggesting that you slog through an IEEE draft standards document. I wouldn't do it for a question like this (those are written for engineers who are designing the hardware to implement the standards).
The info you're looking for should be in any good networking text book.